Weft detector in transferrer arm



`March 27, 192,8.

1,664,007 R. G. TURNER l wEFT DETECTOR 1N TRANSFERRER ARM Filed Dec. 14 1926 556 i2-i3 5b I l mmmmm mf 59` m n l M ummm wenn Patented Mar. 27, 1928,( i

UNITEDY STATES PATENT OFFICE.-

RICHARD GREENLEAE TURNER, or WOECESTER, j MASSACHUSETTS, ASsIoNon To4 CnoivirToN a KNCWLESLoomV WORKS, 0E WORCESTER, YivrASsliCHUSETTS, A Conro- RATION 0F MASSACHUSETTS.

' WEET DETECTOR'IN TEANSFEERET; ARM.

Application filed December`14, 1926.` Serial No.,154,80-4.

This invention relates-to improvementsin weft detectors 'mounted in regularly moying transferrer arms of the type shown 1n patent to Ryon No. 1,372,316 andit is'tlie` general' objecty of the invention: tov makel a readily removablefdetectingl element and mounting therefor. y

In co-pending application `;L/:'1"l8,396*liled by Cederlund;andTurnerthere-is shown a lever pivoted to atransierre'r Iarinand having detector n'iounted Vthereon both 'for' sliding and angular,inovemenaA compression spring tendingtoiliold the detector in normal lower positionand apin'projecteing laterally from thedetec'tor cooperating withl the spring to return the.' detector to its normal position; It is a"more"partici1` lar object' of my invention to 'form a detecting element with a Shank bent 'back on itself to cooperate with a retaining finger on'the supporting lever, the shank being sol proportioned as to permit ready removal and re-y newal of the detecting element;

VVithtliese andy other objects which will appear asthe description proceeds7 I nyinvention relates to the arrangements and combinatioiiso'f partsjliereinafter set forth, and more particularlyv pointedout in the claims. I l i f y In the accompanying drawings, wherein a convenient embodin'ient,ofV my invention is shown. y

Fig.v 1 is a v'vetrical central section through e that portion of the transferrer arm ,which normally lies overthe shuttle.v and bobbin and having the detector cooperating with@ full `supply vof weft,

F ig. 2 1s Aa view similarto Fig. 1 but thedetector moved vto indicating position due to an insufficient supply lof weft on the bobbin, u

Fig.p3 is a vertical section on line 100k-ing gaging' tipk 13.Lv A slot 14y extends verticallythrouglrthe portion ll'between side walls 15, which, in addition to being connected by the heel 12 and tip 13, are connected by an elongated web'16. f v

An indicating plunger 17 is provided with i a head which receives theoutward thrust of a; compression spring 18, said plunger andA springi being locatedgina pocket 19 formed in theV web 16. Aclip 20-:partly closes theV mouth of the pocket and retains thespring 18cooperating'withthe latter in its normal j tendency to move theplungerto the right from the positionshown vin Fig. l. A latch 211pivoted as at 22 invertical slot 14 has a hook 23 proportioned to enter anotch 24;

formed on'the leftend of plunger 17 to hold the latter normally asshown inFig.1-in non-indicating position.r Saidy latch also has a depending tail 25and is normally held in tlierposition lShown in Fig; 1 by a torsion spring 26 oneend of whichpasses overy one of the walls 15 as at 27V`and the other 'end of whichlies over the topof the latch as .at 28. A detector supporting lever 29 is pivoted to the transferrer arm as at 30 and is held normally in raised position'relatively to the transferrerarm by alight tension spring 31 interposed between said leverand a part of the transferrer-arm. f A linger 32 cooperates with web 16 to position thelever vertically'fand the latter has'a vertical portionV 33 terminating in a horizontal arm 34fhaving a slot 35,'see Fig. 5. The mattei' thus far de'- scribed is substantially lthe same as shown in the aforesaid application and it cooperates ywithajmagazine-of the, type setfforth inthe v supporting action of spring 31 and said lever and detector willmove toward thesurface to be detected,` *Y

In carryingv my present invention into effect I provide the supportingarm 29 with "anarrow longitudinal ,vertical slot 50 open at one endas shown in Fig-5.` V' The-detecting lelement 51 may bey formed'ofa single'l piecefof flat stock with a" lower .broadened Y `-weft engaging portionV 572 provided witht spaced parallel yarn penetrating teeth 53' The upper end of the detecting element 51 is 'formed with a shanlrll of reduced Vwidth but of substantially the samethiclrness as thel member 51, said `shank extending upwardlyV through the slot 50and being bent back on itself as at 55 to have a downwardly extending end 56 .l spaced from the main part of the shank.

consider the same necessary asit will sufticeV to have a notch into which the-lower part of'end S6-may normally rest.

;A .hghtcompression spring` 59 surrounds @the lower portion oi' the shank andl is inter-` posed between the broad shoulder yofthe member 51 and a. waslieril vwhich engages theunder .side oi4 the lever 29, said washer being. Awider than the. width ot sloti() and the adjacent part ot the lever 29 being substantially'. perpendicular to the axisof the main part ot .the shank '54.;

The normal action. oilsprmg 59- is to return the detector to a position substantially thev same as that shown in Fig. A1 relatively to the supportinglever 29, the left end of the 'member 51 being held against the lett end ot slot byl reason ot the tact that end 56 of the shank isf off-set from the lli-neot1 action oif'thespring 59. .So` long as sufficient weft is present 'thetcetlrwill be embedded in the yarn and the ldetector held against movement along the bobbin. Vhen insuicient wettl ispresent7 however, the vdetector will slideas shown in lilig.v 2 to engage-tail 25 and litt the hook t23v outoi'zno-t-ch 24, thereby *permitting spring 18 to move thel plunger tothe indicating position shown in Fig. 2. As soon asfthetransferrer arm starts upaifter indication thespring 59 acts aspreviously described to returnthe detector to its normal position. I

As previously, tated one of the features of myV invent-ion isvto provide a, readily removabled'etect-ingelement and it will be seen from an inspect-ion of Figs. `1 and 2 that the slot 50 is ot suflicient` length topermit a detectorto be moved away from larm 33V a sutiicient distance for the end 56 to lieto the right ol linger 57. It is necessary of course in order to ,accomplish this result to have tlie'compression springV 59 of such length as to permit theA detector to move upward-relativelyto. lever 29" so thatfthe bottom oit vend 56' wwill pass over `-the topl of linger 57 The ready 'removal ot the detector can then vbe effected because of the fact that slot 35 is open. "The upper portionof the shank is: suiciently narrow to Vpass through the slot 5 0. The manner ot removing the detector from the supporting element is indicated in Fig. 6.

From the foregoing it will be seen that I have provided a: weft detector in aregularly moving transferrer arm wherein the detecting lelement is readily removable so that the samemay be given slight bending adjustment it necessary or may be given any other needed attention or renewed. u l

`Irlaving thus described my 'nvention vit will be apparentthat changesl and modifications may be made therein vin theart without Ldeparting from the spirit andscope'of the invention, and I do not wish bythose skilled.

to be limited tothe ldetails .herein'disclosed` 1. In Ywett d tec-ting mechanism for a loom v a regularly moving transferrer arm,

a carrier lever'V member ferrer7 a detector mem pivoted to the transer mounted on the carrier lever af d moved by the latter toward the tobeV detected as the transferrer arm'fmoves downwardly, and complementari'- lyV i'ornied connections between the members,

said connections including an open notch in one member into which'a'part of ,the other member extends. u y

2. In wei't detecting mechanism for ya loom having a regularly moving transferrer arm, a 4'carrier member Vmovably mounted with respect to the transie'rrer, a detector member mounted on the carrier, yielding means interposed between the detector-'and carrier members to hold the detectormem-A ber normally yieldingly in position to engage the surfacetojbe detected, and connections vbetween the detector and'carrier'members normally maintained in operative position 'by' 'the-yielding means but movable against said yielding means to release the detector from the carrier, said connections including anv open `notchl in onelmember to receive a part of the other member.v -f 3. In aY weft detecting mechanism for loomshaving a regularly'moving transferrer army a carrier lever pivoted to thetransferrer arm, adetecti-ng element mounted'on the Vcarrier leverv for movement relatively thereto, resilient means interposed between the detecting element and the carrierlever tending to hold f said detecting element to! detector-member supported by and'movable 130 with respect to the carrier member, means defining a loose pivotal connection between the members, said means including a reduced portion of one member to extend into a complementarily formed portion of the other member, and resilient means interposed between the members to hold the detector yieldingly in normal position With respect to the carrier member, said resilient means holding the complementarily formed parts 10 lixed my signature.

RICHARD GREENLEAF TURNER. i

In testimony whereof I have hereunto af 

